JPS6159994B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device that can automatically suck up and eliminate a liquid surface contaminant layer in a liquid tank. The present invention provides a device suitable for preferentially inhaling and eliminating floating highly viscous and highly concentrated oil.

Conventionally, a device for absorbing and removing a contaminant layer floating on the liquid surface in a liquid tank generally floats a main body 1 equipped with a float 2 on the liquid surface in the liquid tank, as shown in FIG. Part 1 ₁ is serrated, and the contaminant layer on the surface layer 4 of the liquid in the liquid tank is sucked up from the serrated valleys 3 and flows out of the liquid tank via a pipe 5 attached to the main body 1. .

In the conventional structure described above, it is difficult to always position the serrated valleys provided on the upper end ₁₁ of the main body 1 at the liquid level in the liquid tank, so it is difficult to stabilize the contaminated layer on the surface layer of the liquid surface. If the contaminant layer floating on the surface is a viscous and highly concentrated oil that cannot be absorbed and removed, the resistance of the oil film becomes large and it becomes impossible to absorb the oil, causing the pump connected to the pipe 5 to idle. It had the following drawbacks.

The present invention eliminates the drawbacks of the conventional device as described above, and
To provide a device capable of absorbing and eliminating even highly viscous oil floating on the surface layer.

Examples of the present invention will be described below.

In Fig. 2, the outer box 10 is fixed to a part of the liquid tank 6 via a mounting member 7 (Fig. 2 A).
0 ₁ (Fig. 2 C, D, this notch opening 1
At position 0 ₁ , a weir plate 13 is provided which can slide up and down along the inner wall surface of the outer box 10 in which the cutout opening 10 ₁ is formed.

A discharge port 11 is provided at the bottom of the outer box 10,
The liquid stored in the outer box 10 is discharged to the outside by a discharge pump (not shown) connected to the discharge port 11.

The weir plate 13 has a serrated or equivalent notch shape ₁₃₁ at its upper end, and allows liquid from the liquid level 15 in the liquid tank 6 to flow in through the notch opening ₁₀₁ of the outer box 10. A float 14 is attached to the weir plate 13 so as to block the inflow of liquid from the liquid level 15 in the liquid tank 6 at the notch opening ₁₀₁ of the outer box 10,
The float 14 is configured to follow the displacement of the liquid level within the outer box 10. By providing a balance weight 141 on the float 14 attached to the weir plate 13, the weir plate 13 can maintain the liquid level ₁ in the outer box 10.
6 ₁ descends to a low position as shown in Figure 2 C,
The position where the liquid at the liquid level 15 in the liquid tank 6 can flow into the outer box 10 beyond the upper end surface ₁₃₁ of the weir plate 13 and the liquid level ₁₆₂ in the outer box 10 are as shown in FIG. To,
By flowing the liquid at the liquid level 15 in the liquid tank 6 into the outer box 10, the liquid rises to the same position as the liquid level 15 in the liquid tank 6, and the liquid from the liquid tank 6 flows into the outer box 10. It is arranged so that it can be displaced to a position that blocks the inflow of liquid.

Note that the notch opening 10 ₁ formed in the outer box 10
is provided in consideration of the range of fluctuation of the liquid level 15 in the liquid tank 6.

Next, the operation of the present invention will be explained.

In the position _shown in FIG. , the liquid level inside the outer box 10 is 16
₂ to 16 ₁ (the liquid level position in Figure 2 C).

As the liquid level in the outer box 10 shifts from ₁₆₂ to ₁₆₁ , the upper end ₁₃₁ of the weir plate 13 integrated with the float 14 moves from the position where the liquid inflow in the liquid tank 6 in FIG. , descends to the position where the liquid flows into the liquid tank 6 in _FIG .
5 of liquid flows into the outer box 10, and the liquid level inside the outer box 10 rises from 16 ₁ to 16 ₂ . Therefore, the weir plate 13 integrated with the float 14 rapidly rises from the position shown in FIG. 2C to the position shown in FIG. 2D.
Subsequently, the weir plate 13 is similarly displaced from the raised position to the lowered position and from the lowered position to the raised position, repeating the inflow and blocking of the fluid in the liquid tank 6, and through the discharge port 11 provided in the outer box 10. The contaminated liquid located on the surface layer inside the liquid tank 6 is discharged.

As described above, in the present invention, the weir plate 13 provided with the float 14 is arranged so that the liquid level 16 ₂ to 16 inside the outer box 10
₁ , 16 ₁ to 16 ₂ repeats rising and falling within the outer box 10 according to the displacement, and the repeated rising and falling action acts against the highly viscous oil located on the liquid surface in the liquid tank. The serrated part of the upper end ₁₃₁ of the weir plate 13, which constantly vibrates and rises and falls, is contaminated with high viscosity oil at the liquid level 15 in the liquid tank 6 at the position where it flows into the outer box 10. It acts to cut and crush the layer, and in combination with the speed at which the weir plate 13 descends, highly viscous oil is reliably sucked into the outer box 10 from between the serrations ₁₃₁ of the weir plate 13. It can be discharged through a discharge port 11 provided at the bottom of the outer box 10.

In addition, in the present invention, even if the liquid level 15 in the liquid tank 6 rises or falls for some reason, a notch opening formed in the outer box 10 is provided to correspond to the fluctuation range of the liquid level 15 in the liquid tank 6. By setting the height H of 10 ₁ , the float 14 is operated only by the influence of the liquid level inside the outer box 10, but the upper end 13 ₁ of the weir plate 13 integrated with the float 14 is connected to the liquid tank 6. liquid level 1
5, the contaminated layer on the surface of the liquid level 15 can be sucked out. Therefore, the liquid level 1 of the liquid tank 6
Even if there is a change in the liquid level 15 of the liquid tank 6, the contaminated layer located on the surface of the liquid level 15 of the liquid tank 6 that has changed can be accurately removed without changing the setting position of the outer box 10.

Furthermore, in the present invention, the weir plate 13 provided on the outer box 10 can accurately follow the liquid level 15 in the liquid tank 6, and the resistance of the oil film due to the concentration of high viscosity oil is large. Even in a contaminated layer, contaminated liquid can always be stored inside the outer box due to the vertical movement of the serrated portion and the suction effect when the serrated portion descends. This also has the effect of preventing drawbacks such as idling of the pump connected to the discharge port 11.

FIG. 3 shows another embodiment of the present invention, in which the outer box 10 and the weir plate 13 of the previous embodiment are both cylindrical, and the upper end of the weir plate 13 is made into a serrated part ₁₃₂ . The upper end ₁₀₂ is arranged so as to be always located below the liquid level 15 in the liquid tank ₆ . This will be the corresponding position.

In this embodiment as well, the liquid at the liquid surface 15 of the liquid tank 6 flows into the sawtooth part ₁₃₂ at the upper end of the weir plate 13 at the position shown in FIG. Due to the liquid ₁₆₂ flowing into the eggplant weir plate 13,
The weir plate 13 forming the inner cylinder is connected to the third
The liquid rises to the position shown in FIG.
3 is lowered by the float ₁₄ as the liquid level ₁₆₁ falls to the position shown in FIG. .

The repeated rise and fall of the cylindrical weir plate 13 and the vertical movement of the serrated part ₁₃₂ at its upper end give a swing to the liquid level 15 in the liquid tank 6, and the suction when the serrated part 132 descends. It is also similar to the previous embodiment that the highly viscous oil contamination layer located on the surface of the liquid tank 6 is guided into the outer box 10 and the weir plate 13 and removed through the discharge port 11.

Since the weir plate and outer box are cylindrical, by attaching the weir plate, which is the inner cylinder, so that it can slide against the outer case, which is the outer cylinder, there is no need for any special guiding means, and the outer box Since the liquid in the liquid tank can be absorbed and removed from the entire circumference of the cylindrical weir plate, it has the advantage of excellent efficiency in wastewater treatment.

In addition, in the present invention, regarding the relationship between the amount of liquid flowing in from the serrated portion at the upper end of the weir plate and the amount of liquid discharged from the outlet of the outer box, the amount of inflowing liquid and the amount of liquid discharged per unit time are set to be equal. This allows the surface layer of the liquid to flow into the outer box at a fixed position with almost no vertical movement of the weir plate, and the amount of inflow liquid per unit time is equal to the amount of discharged liquid. By increasing the amount and changing the degree, the width of the vertical movement of the weir plate can be changed. However, if the initial suction cannot be performed smoothly due to the resistance of this oil film, the lower end of the sawtooth part will fall into the low viscosity liquid layer immediately below the high viscosity oil, such as a cream layer, dispersed oil layer, etc. due to the lowering of the weir plate. It also has the advantage that the cream layer and the like located thereon are suctioned, and this suction flow generates a flow that sucks in highly viscous oil, and as a result, highly viscous oil can also be suctioned.

[Brief explanation of the drawing]

Fig. 1 shows a conventional device for eliminating a liquid surface contamination layer in a liquid tank, and Fig. 2 shows an embodiment of the present invention, in which A is a side view, B is a plan view, and C and D are inside of the outer box. FIG. 3 is a schematic diagram excluding a float showing the displacement of the weir plate and liquid level in FIG. It is a schematic diagram showing displacement of a weir plate and a liquid level in . 6...liquid tank, 10...outer box, 11...discharge port,
13... Weir plate, 13 ₁ , 13 ₂ ... Upper end of serrated or equivalent notch shape formed on weir plate, 1
4...Float.

Claims (1)

[Claims] 1. The outer box fixed in the liquid tank has a part where the weir plate is located lower than the liquid level in the liquid tank, and is a storage area that can temporarily store the liquid flowing from the liquid level in the liquid tank. The weir plate, which is configured to be slidable along the inner wall surface of the outer box, follows the increase and decrease of the liquid in the storage section inside the outer box. a float, and an upper end portion in the shape of a sawtooth or equivalent notch that moves between a position for allowing liquid to flow in from the surface layer of the liquid level and an upper position for blocking the flow of liquid according to the vertical movement of the float; A device for eliminating a contaminated layer on a liquid surface in a liquid tank, characterized by comprising: 2. The device for removing a liquid level contaminated layer in a liquid tank according to claim 1, wherein the outer box and the weir plate have a cylindrical shape.